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(11)

EP 2 717 992 A1

(12)

(43) Date of publication: 16.04.2014 Bulletin 2014/16 (21) Application number: 12725832.5 (22) Date of filing: 06.06.2012

(51) International Patent Classification (IPC):  B01D 53/02(2006.01) B01J 20/26(2006.01) B01J 20/28(2006.01) B01J 20/22(2006.01) B01J 20/32(2006.01) (86) International application number: PCT/EP2012/060778 (87) International publication number: WO 2012/168346 (13.12.2012 Gazette 2012/50)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 06.06.2011 EP 11168838 (71) Applicant: EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt 8600 Dübendorf (CH)	(72) Inventors: GEBALD, Christoph CH-8044 Zürich (CH) ZIMMERMANN, Tanja CH-8044 Gockhausen (CH) TINGAUT, Philippe CH-4500 Solothurn (CH) (74) Representative: Schmauder & Partner AG Patent- & Markenanwälte VSP  Zwängiweg 7 8038 Zürich 8038 Zürich (CH)